ATTINY25-20SUR Atmel, ATTINY25-20SUR Datasheet - Page 232

• Manufacturer Part Number: ATTINY25-20SUR
• Description: MCU AVR 2KB FLASH 20MHZ 8SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY25-20SUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 6
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

iv
ATtiny25/45/85
19 Self-Programming the Flash ............................................................... 145
20 Memory Programming ......................................................................... 151
21 Electrical Characteristics .................................................................... 166
22 Typical Characteristics ........................................................................ 177
18.6
19.1
19.2
19.3
19.4
19.5
19.6
19.7
19.8
19.9
20.1
20.2
20.3
20.4
20.5
20.6
20.7
21.1
21.2
21.3
21.4
21.5
21.6
21.7
21.8
21.9
22.1
22.2
22.3
22.4
22.5
Register Description ......................................................................................144
Performing Page Erase by SPM ....................................................................145
Filling the Temporary Buffer (Page Loading) .................................................145
Performing a Page Write ...............................................................................146
Addressing the Flash During Self-Programming ...........................................146
EEPROM Write Prevents Writing to SPMCSR ..............................................147
Reading Lock, Fuse and Signature Data from Software ...............................147
Preventing Flash Corruption ..........................................................................149
Programming Time for Flash when Using SPM ............................................149
Register Description ......................................................................................149
Program And Data Memory Lock Bits ...........................................................151
Fuse Bytes .....................................................................................................152
Device Signature Imprint Table .....................................................................153
Page Size ......................................................................................................154
Serial Downloading ........................................................................................155
High-voltage Serial Programming ..................................................................158
High-voltage Serial Programming Algorithm .................................................159
Absolute Maximum Ratings* .........................................................................166
DC Characteristics .........................................................................................166
Speed ............................................................................................................168
Clock Characteristics .....................................................................................169
System and Reset Characteristics ................................................................170
Brown-Out Detection .....................................................................................171
ADC Characteristics ......................................................................................172
Serial Programming Characteristics ..............................................................175
High-voltage Serial Programming Characteristics .........................................176
Active Supply Current ....................................................................................177
Idle Supply Current ........................................................................................180
Supply Current of I/O modules ......................................................................182
Power-down Supply Current ..........................................................................183
Pin Pull-up .....................................................................................................184
2586M–AVR–07/10